If you would like to sync the SharePoint files that you have been given access to on your computer please do the following:
Login to Office.com with your 365 Email Account
On the left hand side click on the square made of dots at the very top.
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Once the APP menu opens click on SharePoint
This will open a new tab with SharePoint.
Click on the Folder you would like to sync.
[ This can be Company Name, Location, etc.. depending on what is being shared ]
Once the files that you would like to sync are displayed click on Sync.
You will get a notification that files are being synced to your device.
Once finished you can find those files on your computer as if they were on a shared network folder.